{"id":"CVE-2021-3454","aliases":["EUVD-2021-26777"],"status":"published","title":"Truncated L2CAP K-frame causes assertion failure","description":"Truncated L2CAP K-frame causes assertion failure. Zephyr versions \u003e= 2.4.0, \u003e= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00961,"percentile":0.61822,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-130","CWE-617"],"published":"2021-10-19T22:50:09Z","modified":"2026-06-17T04:05:08Z","products":[{"vendor":"zephyrproject","product":"zephyr"},{"vendor":"zephyrproject-rtos","product":"zephyr"}],"references":[{"url":"http://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory"]}],"sources":{"cve":[{"id":"CVE-2021-3454","title":"Truncated L2CAP K-frame causes assertion failure","description":"Truncated L2CAP K-frame causes assertion failure. Zephyr versions \u003e= 2.4.0, \u003e= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3","status":"published","published":"2021-10-19T22:50:09.038Z","modified":"2024-09-17T00:01:39.51Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-130","CWE-617"],"updated_at":"2026-11-02T14:33:04.020035Z"}],"euvd":[{"id":"EUVD-2021-26777","description":"Truncated L2CAP K-frame causes assertion failure. Zephyr versions \u003e= 2.4.0, \u003e= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3","status":"published","published":"2021-10-19T22:50:09Z","modified":"2024-09-17T00:01:39Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-03T00:29:02.877229Z"}],"nvd":[{"id":"CVE-2021-3454","description":"Truncated L2CAP K-frame causes assertion failure. Zephyr versions \u003e= 2.4.0, \u003e= v.2.50 contain Improper Handling of Length Parameter Inconsistency (CWE-130), Reachable Assertion (CWE-617). For more information, see https://github.com/zephyrproject-rtos/zephyr/security/advisories/GHSA-fx88-6c29-vrp3","status":"published","published":"2021-10-19T23:15:07.517Z","modified":"2026-06-17T04:05:08.17Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-130","CWE-617"],"updated_at":"2026-11-02T14:07:00.137719Z"}]}}